package com.zhuiyun.project.api.system.login.controller;


import com.google.code.kaptcha.Producer;
import com.zhuiyun.project.common.response.CommonResult;
import com.zhuiyun.project.config.ChargeStationConfig;
import com.zhuiyun.project.utils.RedisUtil;
import com.zhuiyun.project.utils.constants.CommonConstants;
import com.zhuiyun.project.utils.sign.Base64;
import com.zhuiyun.project.utils.uuid.IdUtils;
import io.swagger.annotations.ApiOperation;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.concurrent.TimeUnit;

/**
 * 验证码操作处理
 * 
 * @author lzy
 */
@RestController
public class CaptchaController
{
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;


    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    @ApiOperation(value = "获取验证码图片方法")
    public CommonResult getCode(HttpServletResponse response) throws IOException {
        HashMap<Object, Object> objectObjectHashMap = new HashMap<>();
        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();

        String verifyKey = CommonConstants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        String captchaType = ChargeStationConfig.getCaptchaType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        }
        else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        RedisUtil.setCacheObject(verifyKey, code, CommonConstants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            return CommonResult.error(e.getMessage());
        }

        objectObjectHashMap.put("uuid", uuid);
        objectObjectHashMap.put("img", Base64.encode(os.toByteArray()));
        return CommonResult.ok(objectObjectHashMap);
    }





}
